How to dial in the water information in a recipe

Hi,
I've set up a recipe with my own equipment profile at 14.5% boil off rate over 90 minutes.  Starting pre boil volume in my profile is 34.5L.  But in my recipe I set up with a 90 minute boil, it is recommending a pre boil volume of 35.6L with a 15.6% evaporation figure.  Anyone know why this would happen?

Did you update your equipment profile after building the recipe?  If you change the profile after you need to re-select the equipment in your recipe to get the updated numbers.  I checked my BS and the pre boil volume and boil off percentage in both the recipes and equipment profile match.

Mark